Answer:
a) the proportion of students who are dis-honest about their work experience may be higher out of those who submitted their application after the first 1000 applicants than those applicants who were covered in the study.
Step-by-step explanation:
In the first thousand applications, it is given in the context that the nearly one - fifth of the applicants were dishonest in the study. So now it is possible that half of the rest of the applicants are dishonest and hence 1/5 may underestimate the proportion of dishonest applicants.
Hence the correct option is (a).